.start-page{
    margin: 0 auto;
    width: 100%;
    max-width: 414px;
    height: 100%;
    background-image: url(../img/img_bg_logo.jpg);
    background-repeat: no-repeat;
    background-position: center;
}
.start-page img{
    width: 80%;
    margin-left: 10%;
    margin-top: 100px;
}
.start-page button{
    width: 140px;
    height: 40px;
    background-image: url(../img/button.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
    border: none;
    outline: none;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -70px;
}